Oracle Message ORA-15117 - command only operates on one diskgroup

ERRORcommand only operates on one diskgroup
CAUSEAn ALTER DISKGROUP, CREATE DISKGROUP, or DROP DISKGROUP command specified a list of diskgroups or the keyword ALL in a context where only a single diskgroup was permitted.
ACTIONIssue separate ALTER DISKGROUP, CREATE DISKGROUP, or DROP DISKGROUP commands to accomplish the desired action.